__getattribute__ for class object

[Sylvain Ferriol]

hello
when i define __getattribute_ _ in a class, it is for the class instances
but if i want to have a __getattribute_ _ for class attributes

how can i do that ?

sylvain

[Paolino]

Re: __getattribute_ _ for class object

Sylvain Ferriol wrote:[color=blue]
> hello
> when i define __getattribute_ _ in a class, it is for the class instances
> but if i want to have a __getattribute_ _ for class attributes
>
> how can i do that ?
>[/color]

Skating on thin ice eh.Read something on metaclasses.


class Meta(type):
def __getattribute_ _(klass,attr):
value=type.__ge tattribute__(kl ass,attr)
print attr,'==',value
return value

class Foo(object):
__metaclass__=M eta
a=2

Foo.a

Paolino

[Dan]

Re: __getattribute_ _ for class object

> > but if i want to have a __getattribute_ _ for class attributes[color=blue]
>
> Read something on metaclasses.[/color]

Depending on what you want to do, it might be better to use properties
instead:

class Meta(type):
x = property(lambda klass: 'Called for '+str(klass))

class Foo(object):
__metaclass__=M eta

print Foo.x

--
Do I know what's in this bill? Are you kidding? Only God knows...
- U.S. Senator Robert Byrd, when asked if he knew the
contents of a $520 billion, 4000-page spending bill

[Steven Bethard]

Re: __getattribute_ _ for class object

Dan wrote:[color=blue]
> Depending on what you want to do, it might be better to use properties
> instead:
>
> class Meta(type):
> x = property(lambda klass: 'Called for '+str(klass))
>
> class Foo(object):
> __metaclass__=M eta[/color]

Also worth noting that you can inline the metaclass if you don't need it
anywhere else, e.g.:

class Foo(object):
class __metaclass__(t ype):
x = property(lambda klass: 'Called for '+str(klass))

STeVe